the Tx is finished

dma_gpio/src/bin/main.rs

@@ -10,7 +10,6 @@ use embassy_time::{Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};
 
 use embassy_stm32::{
-    dma::Request,
     gpio::{Level, Output, Speed},
     peripherals::{GPDMA1_CH0, TIM6},
     rcc,
@@ -18,7 +17,9 @@ use embassy_stm32::{
 };
 use embassy_stm32::Peri;
 
-use dma_gpio::gpio_dma_uart::{encode_uart_byte, write_uart_frames_to_pipe, GpioDmaBsrrTx, TIM6_UP_REQ};
+use dma_gpio::gpio_dma_uart::{
+    write_uart_frames_to_pipe, GpioDmaBsrrTx, Parity, StopBits, UartConfig, TIM6_UP_REQ,
+};
 
 static PIPE: Pipe<CriticalSectionRawMutex, 256> = Pipe::new();
 
@@ -26,10 +27,16 @@ static PIPE: Pipe<CriticalSectionRawMutex, 256> = Pipe::new();
 const BAUD: u32 = 115_200;
 const TX_PIN_BIT: u8 = 2; // PA2
 
+const UART_CFG: UartConfig = UartConfig {
+    data_bits: 8,
+    parity: Parity::None,
+    stop_bits: StopBits::One,
+};
+
 #[embassy_executor::main]
 async fn main(spawner: Spawner) {
     let p = embassy_stm32::init(Default::default());
-    info!("DMA Pipe -> GPIO UART-like TX (safe wrapper)");
+    info!("DMA Pipe -> GPIO UART-like TX");
 
     // PA2 is the TX "wire"
     let _pa2 = Output::new(p.PA2, Level::High, Speed::VeryHigh);
@@ -51,7 +58,12 @@ async fn main(spawner: Spawner) {
 
     // Example: transmit a string as UART frames via the Pipe
     loop {
-        write_uart_frames_to_pipe(&PIPE, TX_PIN_BIT, b"Hello, DMA UART!\r\n").await;
+        write_uart_frames_to_pipe(
+            &PIPE,
+            TX_PIN_BIT,
+            b"Hello, DMA UART (configurable)!\r\n",
+            &UART_CFG,
+        ).await;
         Timer::after(Duration::from_secs(2)).await;
     }
 }
@@ -70,7 +82,6 @@ async fn dma_tx_task(ch: Peri<'static, GPDMA1_CH0>) {
         }
         let w = u32::from_le_bytes(b);
 
-        // Log + send via DMA (timer-paced, 1 beat per bit time)
         info!("DMA write 0x{:08X} -> GPIOA.BSRR", w);
         tx.write_word(w).await;
     }